Concept explainers
(a)
To explain: whether the test will be on Friday or not
(a)
Answer to Problem 8E
Based on these two surveys, it is predictedthat senate will vote to override the veto.
Explanation of Solution
Given:
Number of “YES” responses | Percent of votes | |
10 | 8 | 80% |
20 | 12 | 60% |
30 | 16 | 53.3% |
40 | 18 | 45% |
Calculation:
From the question statement it is clear that there are only two choices either test will be on Friday or on Monday. Thus the test will be on Friday if more than 50% of student's votes in favor of having test on Friday.
The first two surveys show that more than 50% votes, which are enough to have test on Friday.
So, based on these two surveys, it is predictedthat test will be on Friday.
Conclusion:
Therefore, based on these two surveys, it is predictedthat test will be on Friday.
(b)
To explain: whether the test will be on Friday or not
(b)
Answer to Problem 8E
Based on these two surveys, it is predictedthat test will not be on Friday.
Explanation of Solution
Calculation:
As the sample size increases, the estimated percent of votes approaches 45%, which is not enough to have test on Friday.
So, based on these two surveys, it is predictedthat test will not be on Friday.
Conclusion:
Therefore, based on these two surveys, it is predictedthat test will not be on Friday.
Chapter 11 Solutions
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